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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 76 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.6 + ? = 10
  2. 2.3 + ? = 10
  3. 3.80 + ? = 100
  4. 4.41 + ? = 100
  5. 5.7 + ? = 10
  6. 6.65 + ? = 100
  7. 7.24 + ? = 100
  8. 8.9 + ? = 10
  9. 9.62 + ? = 100
  10. 10.33 + ? = 100
  11. 11.75 + ? = 100
  12. 12.39 + ? = 100
  13. 13.89 + ? = 100
  14. 14.8 + ? = 10
  15. 15.85 + ? = 100
  16. 16.12 + ? = 100
  17. 17.15 + ? = 100
  18. 18.49 + ? = 100
  19. 19.48 + ? = 100
  20. 20.4 + ? = 10
  21. 21.5 + ? = 10
  22. 22.45 + ? = 100
  23. 23.67 + ? = 100
  24. 24.81 + ? = 100
  25. 25.56 + ? = 100
  26. 26.1 + ? = 10
  27. 27.76 + ? = 100
  28. 28.47 + ? = 100
  29. 29.30 + ? = 100
  30. 30.70 + ? = 100
  31. 31.2 + ? = 10
  32. 32.26 + ? = 100
  33. 33.23 + ? = 100
  34. 34.59 + ? = 100
  35. 35.52 + ? = 100
  36. 36.36 + ? = 100
  37. 37.40 + ? = 100
  38. 38.44 + ? = 100
  39. 39.31 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 4
  2. 7
  3. 20
  4. 59
  5. 3
  6. 35
  7. 76
  8. 1
  9. 38
  10. 67
  11. 25
  12. 61
  13. 11
  14. 2
  15. 15
  16. 88
  17. 85
  18. 51
  19. 52
  20. 6
  21. 5
  22. 55
  23. 33
  24. 19
  25. 44
  26. 9
  27. 24
  28. 53
  29. 70
  30. 30
  31. 8
  32. 74
  33. 77
  34. 41
  35. 48
  36. 64
  37. 60
  38. 56
  39. 69
  40. 13

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